8478789101 has 2 divisors, whose sum is σ = 8478789102. Its totient is φ = 8478789100.

The previous prime is 8478789091. The next prime is 8478789139. The reversal of 8478789101 is 1019878748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8033536900 + 445252201 = 89630^2 + 21101^2 .

It is a cyclic number.

It is not a de Polignac number, because 8478789101 - 2⁶ = 8478789037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8478789191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239394550 + 4239394551.

It is an arithmetic number, because the mean of its divisors is an integer number (4239394551).

Almost surely, 2^8478789101 is an apocalyptic number.

It is an amenable number.

8478789101 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478789101 is an equidigital number, since it uses as much as digits as its factorization.

8478789101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 53.

The square root of 8478789101 is about 92080.3404696138. The cubic root of 8478789101 is about 2039.1285766904.

The spelling of 8478789101 in words is "eight billion, four hundred seventy-eight million, seven hundred eighty-nine thousand, one hundred one".